diff --git a/test/test_power_system_table_data.jl b/test/test_power_system_table_data.jl
index dfda723e97..04b3fac1ff 100644
--- a/test/test_power_system_table_data.jl
+++ b/test/test_power_system_table_data.jl
@@ -185,7 +185,7 @@ end
 @testset "Test create_poly_cost function" begin
     cost_colnames = ["heat_rate_a0", "heat_rate_a1", "heat_rate_a2"]
 
-    # Coefficients for a CC using natura gas
+    # Coefficients for a CC using natural gas
     a2 = -0.000531607
     a1 = 0.060554675
     a0 = 8.951100118